CoEnzyme Q10 is an essential component of the mitochondria - "the energy producing unit of the body", similar to the role of a spark plug in a car engine. It is found in every cell of the body, but it is most highly concentrated in heart muscle cells because they use the greatest amount of energy. Most of us have plenty of CoEnzyme Q10 until we reach the age of 30, then our bodies lose the ability to manufacture it at the same levels, so the natural supply begins to diminish. Poor eating habits, stress, infection and medication, can also affect the body's ability to provide adequate amounts. It is an extremely powerful antioxidant, which prevents oxidative damage to the lining of blood vessels and the muscle of the heart. It has shown to offer significant protection against atherosclerosis (hardening of the arteries), angina pectoris, and periodontal disease. It lowers blood pressure in people with hypertension; counteracts histamine, and is therefore, beneficial for people with allergies, asthma, or respiratory disease. Studies have found that a CoEnzyme Q10 deficiency is common in people with heart disease, cardiomyopathy and high blood pressure.